reorganize components and add root import plugin

src/components/main/SubmitButton.jsx

@@ -0,0 +1,28 @@
+import React from 'react';
+
+export default function SubmitButton({ onClick, disabled }) {
+  return (
+    <button onClick={onClick} className="absolute bottom-1.5 right-1 rounded-md p-1 text-gray-500 hover:bg-gray-100 disabled:hover:bg-transparent dark:hover:bg-gray-900 dark:hover:text-gray-400 dark:disabled:hover:bg-transparent md:bottom-2.5 md:right-2">
+      <svg
+        stroke="currentColor"
+        fill="none"
+        strokeWidth="2"
+        viewBox="0 0 24 24"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+        className="mr-1 h-4 w-4"
+        height="1em"
+        width="1em"
+        xmlns="http://www.w3.org/2000/svg"
+      >
+        <line
+          x1="22"
+          y1="2"
+          x2="11"
+          y2="13"
+        />
+        <polygon points="22 2 15 22 11 13 2 9 22 2" />
+      </svg>
+    </button>
+  );
+}